Method of manufacturing an improved duct

Details Method of manufacturing an improved duct Method of manufacturing an improved duct

1991-11-27

1993-05-18

Eley, Timothy V.

Metal working

Method of mechanical manufacture

Gas and water specific plumbing component making

29464, B23P 1102

Patent

active

052109470

ABSTRACT:
A process of producing a duct by extruding a tubular casing composed of a polymeric foam, inserted a helically coiled reinforcing element composed of an electrically conductive metal into the tubular casing, and passing an electrical current through the reinforcing element in order to heat the reinforcing element above the softening point of the tubular casing and to embed the reinforcing element into the inner surface of the tubular casing.

REFERENCES:
patent: 2112238 (1938-03-01), Guarnaschelli
patent: 2333349 (1943-11-01), Weatherhead, Jr. et al.
patent: 4400863 (1983-08-01), Schroeder

Affiliated with

Also associated with

Rating

Method of manufacturing an improved duct does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method of manufacturing an improved duct, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method of manufacturing an improved duct will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-796978